Using mods without "mods" folder?

I am on a fresh license, got inside the game, did those first 2-3 missions, quit game and stuffed mods in it(scripts, vehicles and textures mostly) and now when I wanted to play the first time, it randomly started updating my game and what is funny, it started from 24% and update is 61GB ? Before that, few days ago, I downloaded 68 or 69GB...

Sorry, used crack until now, wanted to turn to the right side, not cool at all...